# Latest

**URL:** https://discourse.slicer.org/latest.md?page=52

[Latest](https://discourse.slicer.org/latest.md) · [Categories](https://discourse.slicer.org/categories.md) · [Tags](https://discourse.slicer.org/tags.md)

**Page:** 53

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## [Slicer upgrade from Python 3.9.10 to Python 3.12](https://discourse.slicer.org/t/slicer-upgrade-from-python-3-9-10-to-python-3-12/43291)

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**Author:** [@Deep\_Learning](https://discourse.slicer.org/u/Deep_Learning)\
**Replies:** 2\
**Last updated:** [June 13, 2025, 5:42pm UTC](https://discourse.slicer.org/t/slicer-upgrade-from-python-3-9-10-to-python-3-12/43291 "2025-06-13T17:42:46Z")

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Windows nightly is still Python 3.9.10 (main, Jun 9 2025, 23:19:40) \[MSC v.1942 64 bit (AMD64)\] on win32. Is a build necessary?

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## [Slicer 5.9.0 with libtorch](https://discourse.slicer.org/t/slicer-5-9-0-with-libtorch/43319)

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**Author:** [@Haoyin\_Zhou](https://discourse.slicer.org/u/Haoyin_Zhou)\
**Replies:** 6\
**Last updated:** [June 13, 2025, 2:50pm UTC](https://discourse.slicer.org/t/slicer-5-9-0-with-libtorch/43319 "2025-06-13T14:50:01Z")

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hi, I am developing a c++ module on Slicer 5.9.0. I have a lot of confusion to use libtorch together with Slicer. I can compile the code but when I call a libtorch function, such as torch::jit::load(path), it crashes wit…

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## [Undo enabled on an empty segmentation](https://discourse.slicer.org/t/undo-enabled-on-an-empty-segmentation/43332)

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**Author:** [@nhjohnston](https://discourse.slicer.org/u/nhjohnston)\
**Replies:** 7\
**Last updated:** [June 13, 2025, 2:32pm UTC](https://discourse.slicer.org/t/undo-enabled-on-an-empty-segmentation/43332 "2025-06-13T14:32:07Z")

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When completing the following steps, the undo/redo buttons are enabled despite no visible changes being made to the segmentation in the scene. Create a new segmentation Select the erase tool Erase in the scene (undo is…

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## [Cranial Implant Reconstruction](https://discourse.slicer.org/t/cranial-implant-reconstruction/43318)

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**Author:** [@Alina\_Abbas](https://discourse.slicer.org/u/Alina_Abbas)\
**Replies:** 2\
**Last updated:** [June 13, 2025, 2:19pm UTC](https://discourse.slicer.org/t/cranial-implant-reconstruction/43318 "2025-06-13T14:19:52Z")

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Hello everyone, I hope this message finds you well. I am new to 3D Slicer and am using it for cranial implant reconstruction. I have attempted to utilize the scissor and mirror techniques on my image, but I have not ac…

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## [Can't install Total Segmentor](https://discourse.slicer.org/t/cant-install-total-segmentor/43313)

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**Author:** [@kopachini](https://discourse.slicer.org/u/kopachini)\
**Replies:** 3\
**Last updated:** [June 13, 2025, 6:40am UTC](https://discourse.slicer.org/t/cant-install-total-segmentor/43313 "2025-06-13T06:40:17Z")

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Hello everyone. It seems I can’t install Total segmentor. I used it on my older, less powerful laptop but fast version, but now I am not able to install it. This is the error I get. I have Lenovo Legion i9 14900HX …

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## [Segmentation of swim bladders in micro-CT scans](https://discourse.slicer.org/t/segmentation-of-swim-bladders-in-micro-ct-scans/43325)

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**Author:** [@BennyShoe](https://discourse.slicer.org/u/BennyShoe)\
**Replies:** 2\
**Last updated:** [June 13, 2025, 12:54am UTC](https://discourse.slicer.org/t/segmentation-of-swim-bladders-in-micro-ct-scans/43325 "2025-06-13T00:54:04Z")

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Hello everyone, I’m new to the Slicer community and currently working on a project involving the segmentation of swim bladders(circled in blue) from fish micro-CT scans. However, I’m running into difficulty due to the l…

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## [Am I able to correct for post-operative brainshift in 3DSlicer?](https://discourse.slicer.org/t/am-i-able-to-correct-for-post-operative-brainshift-in-3dslicer/43337)

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**Author:** [@SegmenterSam](https://discourse.slicer.org/u/SegmenterSam)\
**Replies:** 2\
**Last updated:** [June 12, 2025, 11:24pm UTC](https://discourse.slicer.org/t/am-i-able-to-correct-for-post-operative-brainshift-in-3dslicer/43337 "2025-06-12T23:24:56Z")

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Hello all. I am a student researcher and have found 3DSlicer to be incredibly useful. For my research the goal is to overlay a post-operative segmentation of a resection cavity over the pre-operative segmentation of a g…

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## [Tutorial on creating rCBV map from Perfusion MRI?](https://discourse.slicer.org/t/tutorial-on-creating-rcbv-map-from-perfusion-mri/43336)

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**Author:** [@SegmenterSam](https://discourse.slicer.org/u/SegmenterSam)\
**Replies:** 0\
**Last updated:** [June 12, 2025, 9:17pm UTC](https://discourse.slicer.org/t/tutorial-on-creating-rcbv-map-from-perfusion-mri/43336 "2025-06-12T21:17:08Z")

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Hello, While I am fairly certain that 3DSlicer can do what I need, I am a bit lost on where to find information on how to do it. I have a series of 950 slides of Perfusion MRI data. As I understand it, I must convert t…

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## [Axial slice colour suddenly pink - how to reset?](https://discourse.slicer.org/t/axial-slice-colour-suddenly-pink-how-to-reset/43329)

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**Author:** [@tcrnscw](https://discourse.slicer.org/u/tcrnscw)\
**Replies:** 4\
**Last updated:** [June 12, 2025, 7:21pm UTC](https://discourse.slicer.org/t/axial-slice-colour-suddenly-pink-how-to-reset/43329 "2025-06-12T19:21:21Z")

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Hello, I’m having an issue with the axial slice view in 5.8.1. It suddenly is loading only this slice plane in bright pink, and I’m not sure what I’ve done or how to fix this. The sagittal and coronal views are still in…

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## [Isocontour between three classes for orbital reconstruction](https://discourse.slicer.org/t/isocontour-between-three-classes-for-orbital-reconstruction/43271)

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**Author:** [@Motrolol](https://discourse.slicer.org/u/Motrolol)\
**Replies:** 3\
**Last updated:** [June 11, 2025, 10:55pm UTC](https://discourse.slicer.org/t/isocontour-between-three-classes-for-orbital-reconstruction/43271 "2025-06-11T22:55:40Z")

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Dear All, I have been reading the forums to improve orbital bone reconstructions, and thank you for the active community to coming together and solutions proposed. I am trying to reconstruct the orbit from CT scans wit…

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## [Importing Segmented Structures from 3D Slicer into Monaco (DICOM Format)](https://discourse.slicer.org/t/importing-segmented-structures-from-3d-slicer-into-monaco-dicom-format/43322)

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**Author:** [@Shmarvinoid](https://discourse.slicer.org/u/Shmarvinoid)\
**Replies:** 1\
**Last updated:** [June 11, 2025, 8:56pm UTC](https://discourse.slicer.org/t/importing-segmented-structures-from-3d-slicer-into-monaco-dicom-format/43322 "2025-06-11T20:56:26Z")

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Good afternoon! I’d like to inquire about how to import segmented structures from 3D Slicer into Monaco (in DICOM) and ensure they are displayed as contours (Structures). I am unsure whether Monaco supports working with…

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## [Hair thickeness measurement](https://discourse.slicer.org/t/hair-thickeness-measurement/43321)

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**Author:** [@AhmedHM](https://discourse.slicer.org/u/AhmedHM)\
**Replies:** 0\
**Last updated:** [June 11, 2025, 3:59pm UTC](https://discourse.slicer.org/t/hair-thickeness-measurement/43321 "2025-06-11T15:59:27Z")

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Hello all, I am a hair researcher and a newbie to Slicer3D. I came to know Slicer3D from the article entitled “Clinical efficacy and safety of low‐dose oral minoxidil versus topical solution in the improvement of androg…

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## [3D visualization of varying BMD](https://discourse.slicer.org/t/3d-visualization-of-varying-bmd/43314)

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**Author:** [@S\_Motch\_Perrine](https://discourse.slicer.org/u/S_Motch_Perrine)\
**Replies:** 1\
**Last updated:** [June 11, 2025, 3:46pm UTC](https://discourse.slicer.org/t/3d-visualization-of-varying-bmd/43314 "2025-06-11T15:46:14Z")

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I am wondering if you have any suggestions for me on how to tackle this task in 3D Slicer. I have four genotypes of mice for a rather complex phenotype, and want to visualize the differences in BMD across all the bones o…

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## [Efficient Segmentation of Fossil Vertebrae from Matrix in 3D Slicer](https://discourse.slicer.org/t/efficient-segmentation-of-fossil-vertebrae-from-matrix-in-3d-slicer/43277)

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**Author:** [@Busra\_Pullu1](https://discourse.slicer.org/u/Busra_Pullu1)\
**Replies:** 2\
**Last updated:** [June 11, 2025, 9:55am UTC](https://discourse.slicer.org/t/efficient-segmentation-of-fossil-vertebrae-from-matrix-in-3d-slicer/43277 "2025-06-11T09:55:34Z")

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Hi all, I’m working with an undergrad student to segment individual fossil vertebrae from a CT-scanned articulated specimen (paleontological data). We’re using 3D Slicer, and the matrix and bone have very similar densit…

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## [Keyboard shortcut to measure plane angles?](https://discourse.slicer.org/t/keyboard-shortcut-to-measure-plane-angles/43299)

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**Author:** [@ben.rodwell](https://discourse.slicer.org/u/ben.rodwell)\
**Replies:** 0\
**Last updated:** [June 10, 2025, 10:54pm UTC](https://discourse.slicer.org/t/keyboard-shortcut-to-measure-plane-angles/43299 "2025-06-10T22:54:31Z")

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I’m trying to make a keyboard shortcut to use the “Measure angle between two markup planes” script in the script repository so that I can quickly measure the angles between planes without having to copy and past the code…

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## [2025.06.10 Weekly Meeting](https://discourse.slicer.org/t/2025-06-10-weekly-meeting/43288)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 1\
**Last updated:** [June 10, 2025, 6:40pm UTC](https://discourse.slicer.org/t/2025-06-10-weekly-meeting/43288 "2025-06-10T18:40:31Z")

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Today, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET, after the project week meeting. We will be reusing the Project Week Zoom link. Anyone is welcome to join at this link: Launch Meeting -…

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## [Slicer tools works on the wrong slice](https://discourse.slicer.org/t/slicer-tools-works-on-the-wrong-slice/35415)

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**Author:** [@radiodid](https://discourse.slicer.org/u/radiodid)\
**Replies:** 3\
**Last updated:** [June 10, 2025, 5:34pm UTC](https://discourse.slicer.org/t/slicer-tools-works-on-the-wrong-slice/35415 "2025-06-10T17:34:36Z")

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When I use the Paint or Erase tools, the action takes place on the adjacent slide, not the one I want. And this does not happen with all slices, but only with individual ones, and I cannot find any regularity in this. So…

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## [nrrd segmentation file error](https://discourse.slicer.org/t/nrrd-segmentation-file-error/43292)

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**Author:** [@SDV](https://discourse.slicer.org/u/SDV)\
**Replies:** 0\
**Last updated:** [June 10, 2025, 4:42pm UTC](https://discourse.slicer.org/t/nrrd-segmentation-file-error/43292 "2025-06-10T16:42:08Z")

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Version 5.8.0 Slicer crashed while using paint brush in a segmentation, and now the nrrd segmentation file seems corrupt and I can’t seem to load it in any way. Any help please? The message detail is: Exception thrown…

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## [Question About Threshold Tool in Segmentation](https://discourse.slicer.org/t/question-about-threshold-tool-in-segmentation/43284)

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**Author:** [@Aya\_Gamal](https://discourse.slicer.org/u/Aya_Gamal)\
**Replies:** 2\
**Last updated:** [June 10, 2025, 4:24pm UTC](https://discourse.slicer.org/t/question-about-threshold-tool-in-segmentation/43284 "2025-06-10T16:24:20Z")

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I have a question regarding the threshold tool in segmentation. When I set the threshold value, several segments appear merged together in one segment. I would like to separate each of them into individual segments. Coul…

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## [Multivolume Explorer gives error in 5.4 version,  so does module "sequences" allows to plot time intensity charts from multivolume datasets? ](https://discourse.slicer.org/t/multivolume-explorer-gives-error-in-5-4-version-so-does-module-sequences-allows-to-plot-time-intensity-charts-from-multivolume-datasets/31834)

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**Author:** [@Jakub.Otahal](https://discourse.slicer.org/u/Jakub.Otahal)\
**Replies:** 4\
**Last updated:** [June 10, 2025, 3:50pm UTC](https://discourse.slicer.org/t/multivolume-explorer-gives-error-in-5-4-version-so-does-module-sequences-allows-to-plot-time-intensity-charts-from-multivolume-datasets/31834 "2025-06-10T15:50:40Z")

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Hello everybody, I have used for long time Multivolume Importer and Explorer to view and analyse DCE datasets in Slicer 4.11. Today when I come back to that with new 5.4 version of Slicer I realized that the Multivolume…

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## [2025.06.03 Weekly Meeting](https://discourse.slicer.org/t/2025-06-03-weekly-meeting/43208)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 1\
**Last updated:** [June 10, 2025, 3:06pm UTC](https://discourse.slicer.org/t/2025-06-03-weekly-meeting/43208 "2025-06-10T15:06:20Z")

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TODAY, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET, after the project week meeting. We will be reusing the Project Week Zoom link. Anyone is welcome to join at this link: Launch Meeting -…

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## [Portable 3D Slicer for macOS with Auto-Import DICOM Directory](https://discourse.slicer.org/t/portable-3d-slicer-for-macos-with-auto-import-dicom-directory/43276)

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**Author:** [@Wyatt\_Gray](https://discourse.slicer.org/u/Wyatt_Gray)\
**Replies:** 2\
**Last updated:** [June 10, 2025, 2:01pm UTC](https://discourse.slicer.org/t/portable-3d-slicer-for-macos-with-auto-import-dicom-directory/43276 "2025-06-10T14:01:28Z")

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Introduction: I’m an engineer and have been tasked with sharing a patient’s DICOM dataset with a macOS-based Dr. (expert). The imaging location provided a DICOM directory and an application but users report errors openi…

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## [Saved linearly transformed images change orientation](https://discourse.slicer.org/t/saved-linearly-transformed-images-change-orientation/43250)

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**Author:** [@NinaO](https://discourse.slicer.org/u/NinaO)\
**Replies:** 2\
**Last updated:** [June 10, 2025, 1:25pm UTC](https://discourse.slicer.org/t/saved-linearly-transformed-images-change-orientation/43250 "2025-06-10T13:25:39Z")

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Dear 3D Slicer Community I tried searching through previous topics, but did not find an answer to my problem. I had a few images I needed to manually rotate so they have approximately the same orientation. For this I f…

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## [Use slicer vi@ web browser with parameters](https://discourse.slicer.org/t/use-slicer-vi-web-browser-with-parameters/43282)

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**Author:** [@nicofutur8](https://discourse.slicer.org/u/nicofutur8)\
**Replies:** 1\
**Last updated:** [June 10, 2025, 12:54pm UTC](https://discourse.slicer.org/t/use-slicer-vi-web-browser-with-parameters/43282 "2025-06-10T12:54:14Z")

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Hello everyone, I have created a plugin called “showPatientInfo” which shows certain metadata from a volume stored in DB and also shows if any user has connected. The thing now is I would want to show this plugin vi…

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## [Mirror landmarks and evaluate mandible asymmetry in DeCA](https://discourse.slicer.org/t/mirror-landmarks-and-evaluate-mandible-asymmetry-in-deca/43177)

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**Author:** [@yijie3091](https://discourse.slicer.org/u/yijie3091)\
**Replies:** 4\
**Last updated:** [June 10, 2025, 7:03am UTC](https://discourse.slicer.org/t/mirror-landmarks-and-evaluate-mandible-asymmetry-in-deca/43177 "2025-06-10T07:03:29Z")

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Dear professor，I have downloaded the DeCA and successfully used it to generate a mean mesh from mandible datasetes，but if I want to evaluate the mandible asymmetry across the midsaggital plane in the “Mirror Data” and “D…

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## [OpenDose3D Compatibility Issue with Latest SlicerElastix Version (AttributeError on Registration)](https://discourse.slicer.org/t/opendose3d-compatibility-issue-with-latest-slicerelastix-version-attributeerror-on-registration/43275)

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**Author:** [@Kumar\_Abhishek](https://discourse.slicer.org/u/Kumar_Abhishek)\
**Replies:** 0\
**Last updated:** [June 9, 2025, 7:42pm UTC](https://discourse.slicer.org/t/opendose3d-compatibility-issue-with-latest-slicerelastix-version-attributeerror-on-registration/43275 "2025-06-09T19:42:01Z")

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Hi team, I’m using OpenDose3D version d73d832 (2025-01-12) on Slicer 5.6, and facing an issue when executing the Registration step. Upon clicking Execute in the Registration tab, I get the following error: AttributeErr…

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## [Setting Python 3.9.22 as Default in 3DSlicer Python Interactor](https://discourse.slicer.org/t/setting-python-3-9-22-as-default-in-3dslicer-python-interactor/43268)

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**Author:** [@shahrokh](https://discourse.slicer.org/u/shahrokh)\
**Replies:** 0\
**Last updated:** [June 9, 2025, 9:22am UTC](https://discourse.slicer.org/t/setting-python-3-9-22-as-default-in-3dslicer-python-interactor/43268 "2025-06-09T09:22:30Z")

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Hello Dear Developers and Users I find out that in 3DSlicer, there are two different Python versions. One is version 3.9.10, which is in Python Interactor and related to PythonSlicer executable file. The other is versio…

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## [Developing for Slicer on Apple Silicon (build targeting x86\_64)](https://discourse.slicer.org/t/developing-for-slicer-on-apple-silicon-build-targeting-x86-64/40686)

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**Author:** [@arhowe00](https://discourse.slicer.org/u/arhowe00)\
**Replies:** 5\
**Last updated:** [June 9, 2025, 3:31am UTC](https://discourse.slicer.org/t/developing-for-slicer-on-apple-silicon-build-targeting-x86-64/40686 "2025-06-09T03:31:09Z")

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The developer docs may need a minor update addressing development on the newer Macs (M-series chips). Here is a sufficient-for-development build from source on arm64 MacOS without requiring niche workarounds for specific…

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## [Importing a 3DSlicer body model into Unreal game engine](https://discourse.slicer.org/t/importing-a-3dslicer-body-model-into-unreal-game-engine/9183)

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**Author:** [@jtle](https://discourse.slicer.org/u/jtle)\
**Replies:** 2\
**Last updated:** [November 18, 2019, 2:37pm UTC](https://discourse.slicer.org/t/importing-a-3dslicer-body-model-into-unreal-game-engine/9183 "2019-11-18T14:37:49Z")

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Is it possible to create a model of a body with all the underlying organs, etc and then import the model into Unreal game engine for further interaction between user and the simulation? And how would the importation be d…

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## [Crashing of 3DSlicer version 5.8.1 after importing openGate Python package](https://discourse.slicer.org/t/crashing-of-3dslicer-version-5-8-1-after-importing-opengate-python-package/43256)

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**Author:** [@shahrokh](https://discourse.slicer.org/u/shahrokh)\
**Replies:** 2\
**Last updated:** [June 8, 2025, 4:12am UTC](https://discourse.slicer.org/t/crashing-of-3dslicer-version-5-8-1-after-importing-opengate-python-package/43256 "2025-06-08T04:12:44Z")

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Hello Dear Developers and Users I installed the opengate library in python of 3DSlicer. But after importing it in python interactor and pressing the menu key or pressing the tab key for completing the names of imported …

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